pantywaist

A pantywaist was formerly a child's undergarment in which a shirt and
pants were buttoned together at the waist. Earliest documented use: 1910.

USAGE:

"The question on many people's minds: Will the genteel Mr. Creel, more
comfortable buried in legal briefs than in the trenches of hand-to-throat
political combat, be able to respond in kind? He doesn't see himself as
a political pantywaist."
Peter Fritsch and Jose de Cordoba; Would You Fall into Line for This Man?;
The Wall Street Journal (New York); Jan 11, 2001.